Good information. In two formats. One is the video, the other is the written transcripts of the video. Covers the information well.

This article makes an important point: Heartburn is a symptom. That is, the burning sensation Jim described behind the breastbone that goes up into the throat. But GERD is actually what's happening. GER, actually. Gastroesophageal reflux. Meaning, you're getting flow of acid from the stomach into the esophagus. So the process is reflux. The end result, most commonly, is heartburn.